Machine for making sand molds.



No. 877,999. I PATENTED FEB. 4, 1908.

P. HERBERT. MACHINE FOR MAKING SAND MOLDS.

APPLICATION FILED DBO. 26. 1906- 2 SHEETS-SHEET 1.

JIIEI ATTORNEYS No. 877,999. PATENTED FEB. 4, 1908. P. HERBERT.

MACHINE FOR MAKING SAND MOLDS.

APPLICATION FILED D30. 26, 1906.

2 SHEETS-SHEET 2.

JEN/

- wlzw/sss/ss ATTORNEYS xmw,

FRED HERBERT, OF BIRTLEY, ENGLAND.

-MAGHINE FOR -MAKING SAND MOLDS.

Specification of Letters Patent.

Patented. Feb. 4:, 1908.

Application filed December 26 1906. Serial No. 349.539.

T all whom it "may concern:

Be it known that I, FRED HERBERT, a subject of the King of Great Britain, residing at Birtley, county of Durham, England,

have made a certain new and useful Invention in Machines for Making Sand Molds, of which the following is a specification.

The invention relates to machines for making sand molds.

The object ofthe invention is to provlde a machine which is simple in construction, and eflicient in operation, for forming sand molds.

A further object is to provide a machine of the .character referred to, for making molds of different sizes.

Other objects of the inventionwill appear more fully hereinafter.

The invention consists substantially in the construction," combination, location and arrangement of parts, all as will be more fully hereinafter set forth, as shown in the accompanying drawings, and finally pointed out in the appended claims.

Referring to the accompanying drawings, and to the various views and reference signs appearing thereon,Figure 1 is a view in top plan of a machine embodying my invention. Fig. 2 1s abroke'nview in vertical longitudinal section showing two. sets ofsand mold forming devices, one set being shown in retracted posltion and the other set being shown in advancedposition.

In a plant equipped for forming sand molds, and in order to supply varying sizes of molds, it'is desirable to provide means whereby the varying sizes of molds may be formed and produced expeditiously, and

with the greatest economy of space. Machines of this character are usually large, cumbersome and expensive and each machine requires a considerable floor space, thereby rendering it diflicult and expensive to equip a plant with a separate machine for each size of pipe mold to be roduced. Again, in the construction of eac mold it is exceedingly important to pack or ram the sand uniformly throughout, was to produce a homogeneous product, thereby avoiding the possibility of spoiling the pi e to be produced or cast, through inequa ities of, contraction of the metal duetoinequalities in the density of the mold. In securing the best results it is also essential that themold the port D.

attain especially in the case of molds of small diameter and great length.

It is among the special purposes of the present invention to provide a machine, which, while occupying the same, or very little more than the space necessary to accommodate a single machine for large. size molds, is capable of forming'a plurality of molds of small diameter. a

It is also among-the special purposes of the present invention to. provide a machine for forming molds of small diameterv and of great length with the same degree of un1- formity of density ofcompactness throughout as is necessary informing molds for pipes of larger diameters, and wherein the same accuracy in alinement is secured, and wherein the sockets and spigots are formed with the same facility and efficiency as in the case of larger sized molds.

In carrying out my invention I employ a main casing A, in which I arrange a base support B, for a plurality of stationary vertical hydraulic cylinders C, of a length as great or greater than the length of the molds to be formed to each of which may be supplied an operating'mediuin at a point adjacent its lower end, as, for instance, through In practice, and as shown, but not necessarily, the port D, of each cylinder is located below a partition or division plate E, ofthe cylinder, and which partition or cylinder has a central opening F, to admit the operating medium thereto, to theportion of the cylinder above such plate or artition. Working within each cylinder is a p unger G. Each piston at its upper end is formed with a seat or socket to receive the end ofa pattern or rammer, H, of extended length. The length of such pattern or rammer being reater than the length of the mold to be formed. The lower end of the pattern or rammer H, is secured in any suitable or convenient manner in the socket or seat in the 'upper end of the. piston G, as, for instance,

ner varying sizes of patterns or rammers may be employed in connection with each piston or plun er.- Ordinarily, however, and as shown,

plungers or pistons, thereby enabling the same machine to produce varyingisizes of molds, within a desirable range of sizes of propose to employ varying sizes of patterns or' rammersfor the respective.

I L, in" which the mold is formed. Reference: sign M, designates a sleeve of'extended' length, .as distinguished from a ring. This auxiliary casing K, and i s-shaped at its up er "end, as indicated at N, to form the soc et" pipes required, without the necessity of removing or replacing individual patterns or rammers.

Supportedupon the upper. end of the main casing is ail-auxiliary casing K, upon which isreceived, supported andcentered the flask sleeveis arranged to bereceived within the pattern for the mold. At its lowerend the sleeve M'is provided with a flange, 0, through which are tappedadjusting screws P, adapted to-fo'rm adjustable'stops for limiting the ,u ward movement of such sleeve, said stops 7 a 'utting against the under side of the base of the auxiliary casing when said sleeve is v raised sufficiently. The sleeve M, is supported, when'in its retracted position, by pins or supports R, adapted to be inserted through any one of a series of-holes S, in auxiliary cas- K, whereby the normal height of the socket. patternpor tio'n of sleeve M, when in its retracted 'position/ may be adjustably regulated, thereby regulating andadjusting sleeve with reference to the lower end of the 30,

the position of the socket pattern part of the flask in which said pattern is received, and

hence al so regulating and "controlling the.

qiEntity of sand or other composition re- .uired tofor mthe socket end of the mold.

he main attern H, is arranged to pass through an s closely fitted to the bore of sleeve M, and said'sleeve, as well as the flask,

is supported-sand arranged in abs olute. an'dtme.

I alinement vwith the lineof movementofj the main pattern. Hi The upper end ofthe main atternis slightiytapering for a considera ledistance, as-indicated at T, andis' I provided at the extremity "thereof with a seat or shoulder U,- upon which is received and centered the lowerendof a tube V,

which'serves as a measuring tool formeasur ing and controlling the-amount ot sand or other composition form the mold. Y

supplied to the .flask to,

It will be readilyunderstood .that asthe main pattern isl raised' through the flask in,

theper'formance of its work of ramming-compressing. and smoothing the bore of the mold, this measuring tube is gradually and corf -res'pondingly ispla'ced endwise through the 55,-

upper end of the" flask, and finally, when the advancing end of the main pattern emerges above thelupper end 0f the-flaskthemeasuringtool will have entirely completed its work and is. then removed; 1 Upon the projecting end of the main pattern a'spigot .and gate I forming pattern, indicated atW, is then'secured and thestroke" ofthe main patternis.

: reversed, thereby causing such spigot and gate pattern to be carried down-to erform its Work of-fforming the upper en of themold. When this work is completedthe spigot pattern is removed' and flthe main pattern withdrawn to its initial retracted position to permit the :llask, withfits-com pleted mold, to be removed. Themeasuring' be made the main pattern H, of the desired size is raised through the sleeve endf'until the tapering end T, of such pattern just projects 'quite through the upper end of the sleeve'M, extending into the flask L, as

clearly shown at the left of Fig. 2, the raising of thefpattern being efliected by admitting operating medium to the cylinder 0, through port D,;Iand below the lower end of the plunger G, thereby causing the plunger to move longitudinally through; the cylinder cap,

carrying the main-pattern with it. WVith the main pattern in the position shown at the -left of Fig. 2,. the measuring tool V, is inis'erted through the upper'end of the flask and is received,- supported and centered at its lower end upon the shoulder U, on the end ofthe main pattern, and is'properly-centeredat its upper end within thefla'sk,

auxiliary casing, at the upper end thereof, the

exterior surface of the socket pattern portionof the sleeve M, and the exterior surfaces of the main. pattern.,-and the measuring tool. In this mannerthe size or diameterof the measuring tool determines. or measures thespace into Which the sand to formthe mold is delivered, thereby measuring the quantity ofn he sand required Ordinarily, the taper-" The sand'to' form the mold is then introduced to the flask .andinto' the space-bounded by the inner surface of the flask, the inner wall-of the rig end of, the main pattern includes practically the entire extent of that por'tion'of the flask when. the sand or other composition is introduced to the flask. When the sand has, been introduced'into the flask, as above ex- Y plained, the ower medium'is again admitted to the c'ylin er C, and the" main pattern H, is advanced longitudinally through the sleeve M, and flask L, beingguided with absolutely true alinement by such sleeve, and also by .the mold as. it is formed. The upper long tapering advancing end of the main pattern constitutes-the rammer and eflects the desired ramming and compression of the sand" 'withln the flask, the bore of the mold thus compacted .and compressed, being smoothed and ironed out by t e cylindrical portion of 1110 upperend thereof which extends in to the the mainpattern, -b elow'the ramming end thereof,.assuch ortionof the .mainpattern such bore also affords a guiding support for advances throug the compressed sand, and 1 :maintaining .absolute alinement of the pat The sleeve tern inits advancing movement. M, also affords'a mosteificient guide for the main pattern, and herein lies the importance and value of employing a sleeve of extended length, rather than a mere ring, and when I refer to this element of the machine'as a sleeve, I desire to be, understood asmaking this distinctioni 'As the-mainpattern approaches theupper limit of its stroke the upper end of the plunger Gr,- abuts against the lower end of the sleeve'M, and thereafter.

the sleeve and main pattern advance to-' gether, the socket pattern part N,.-of' the] sleeve forming, ramming and compacting the sand at the lower end of the mold, to. form the socket end thereof. Thev extent-0f the advancing'movementof the s'leeve'being adjustedand regulated by the set screws P.

Bythe time the sleeveM, hascompleted its upper movement, the upper end of the main pattern will have advanced entirelythrough y the flask, thereby forcing out the measuring tool, which is then removed and the spigot or gate pattern -W, is secured in place on the The stroke of the mitting the flask containing-the completed u-flask. The apparatus is then ready for? mold to be removed and replaced by another another operation a It will be seen that the use-of a long cylin;

ear. C, with the plunger or piston G, 0 ,erat 'ing therein, the sleeve M, of extended ength through which tliemain pattern operates,

and the bore ,of the forming mold, all co1i' tributeto maintain absolute and true aline'-' merit of the main pattern while erforming its work, thereby insuring an'abso utely tr-ne' mold', and in these features resides animp'ortant characteristic-of my present inventinn. It will also be seen that each' mold, whether :of smaller orlarger diameter ispacked or rammed to uniform density .throughout,,including the socketqand spigot ends thereof. It will also be seen that I provide an exceedingly simple and efficient construction where -in I embody in a single main casing means for producing molds of different diameters, and this is particularly important and desirable in the case of plants for making molds for long pipes of small diameter, enabling such molds to be madein varieties of sizes and as readily and easily, and with'asfgreat facility and efficiency, as in the case of lar er'molds, anden-tirely by machinery, and

- wit practically 'no greater requirement for floor space than is necessary for a. single .machine. It will also be seen that I. am enbo'dying the principles thereof,

abled toprolong the length of the operating cylinder to the topplate of the main casing and. closely adjacent to the lower end of the sleeve M, thereby requiring the plunger ofpiston G, to emerge only a short distance from the cylinder in order to engage andv raise thesleeve M tofthe limit of its upward stroke to enable the socket pattern formed thereon ){to perform its work, andhence enabling the cylinder C, .to serve efficiently as. a guideito maintain the true and accurate [alin'ement of the parts throughout the entire stroke of the piston.

' -Having nowfset forth the object and na ture of=my invention and-a construction emand having describedsuch construction, its purpose, functionand mode of operation, .whatl 1. In a'machine for formingsandmolds, the combination with amain casing, of a stationary cylinder arranged therein and adapted to receive an operating medium, a

; pisto'noperating in said-cylinder and having a socket or seat in'tlie end thereofl'a main *pattern having its lower end stepped and claim as newand useful and ofmy own in vention, and desire to.secure by Letters Patent-1s secured in said socket or seat,- the ,upperend" f 1 of said main pattern being tapered and providedw'ith-a shoulder, an auxiliarycasing, a

sleeve of extended length, supported in said auxiliary casing and throng which. said pattern operates, a flask supported upon said-auxiliary casing, to receive the pattern. therethrough, and a measuring tool sup-" (ported upon the shoulder at the upper end of said pattern. i

j 2.- In a machine for forming sand molds, the combination with a stationary cylinder and a piston plunger operating therein, said piston plunger havinga seat in the upper end thereof, of a pattern having its lower end stepped and secured in 'saidisea't, the upper end of said pattern being taperedand provided. with a shoulder forming a seat, a

measuring tool, supported and centered upon said-shoulder, a-flask arranged to receive the pattern and the measuring tool longi-j tudinally through the bore thereof, a sleeve of extended length supported below the flask in position to receive the pattern thereat its upper end, and means for adjusting the position of the sleeve with reference to its 7 support, saidsleeve arranged to be engaged by the piston whereby it is advanced to its work.

' 3., In a machine formaking sand molds,

the combination with a cylinder and plunger, a pattern carried-by the lunger, and a flask, of a sleeve of extended ength, arranged be- "low. the flask and throu h which the pattern operates, means for=a justabl supporting said sleeve with reference to t e flask, said -through, said sleeve having a socket pattern I I sleeve adapted to be engaged by the plunger of the plunger, and havinga supporting-- shoulder at its upperend, a measuring tool adapted to be supported and carried by said. shoulder, and a flask, of an aimiliary casing, a sleeve of extended length adjustahly supported therein for movement endwise to- Wards the flask, said sleeve formed with a socket pattern at' its upper end, the plunger adapted to engage the lower end of said sleeve to advance the same.

5. In a machine for making sand molds, the combination with a cylinder, a plunger operating therein,- and having a seat in the end thereof, a pattern having its lower end received and secured in said seat, a measuring tool. supported and centered upon. the up per end of the pattern, and a flask, the upper end of said patternbeing ti-tpcred, of a casing supporting said flask, a sleeve of extended lengtl'i arranged within. said casing for end wise movement therein, said pattern operat ing through said sleeve, the lower end of said sleeve adapted to he engaged by the end of the plunger whereby said sleeve is moved endwise, means for adjustahly supporting said sleeve, a socket pattern carried by the upper end of the sleeve, and means for adjustably limiting the endwise movement of the sleeve.

6. In a machine for making sand. molds, a main easing having a base plate, a plurality of stationary cylinders arranged'in said casing and. supported upon said-base plate, a

plunger operating in each cylinder, each plunger having a seat in the end thereof and a pattern supported in the seat in the end. of each plunger, said patterns varying from each other in diameter.

7, In a machine for making sand molds, a main casing, a base plate arranged therein, a plurality of cylinders mounted on said base plate, a plunger operating in each cylinder, a pattern carried by each plunger, a flask through which each pattern operates, and means for guiding each pattern, said pat terns varying from each other in diameter.

8. In a machine for forming sand molds, theeombination with a stationary cylinder of a length .as great as the length of the mold to be formed, a plunger operating in said cylinder, and a pattern or rainmer removably secured to the end of saidv plunger, said. pattern or rammer being of greater length than the length of the mold. to be formed, of a flask, means" for supporting and centering.

said flask in axial alinement with. said pattern or rammer, a sleeve of extended length surrounding the pattern orrammer, and

shaped at its upper end .to form the socket end ofthe mold, means for adjustably supporting said sleeve, a measuring tool centered and. reinovablysupported upon the upper end of the pattern, means for centermg and guldmg sald tool n said flask, and a spigot patternadapted to be detachably secured to the end oi the first mentioned pattern. y

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this seventh day of December A. D. 1906'. g I

FRED HERBERT.

Witnesses; I I Q I I "riln'xtmu G. VARLEY, Bonner WILsON, 

